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Multiply and Divide Decimals by 10, 100, 1000 Worksheet

Speed calculation lesson 17: Decimal point jumps · Set 423 · 40 questions
TalentJR

The fast method (Jump the point): Count the zeros: 10 → 1 jump, 100 → 2 jumps, 1000 → 3 jumps. × moves the point right; ÷ moves it left. Run out of digits? Fill the gaps with 0s. Drop 0s at the end of a decimal: 3.40 is 3.4.

NameDateTime takenScore ___ / 40
  1. 1.9.89 ÷ 10 =
  2. 2.28.1 × 100 =
  3. 3.85.8 × 100 =
  4. 4.40.9 ÷ 1000 =
  5. 5.104.7 × 100 =
  6. 6.38.91 ÷ 1000 =
  7. 7.374.2 ÷ 1000 =
  8. 8.32.74 ÷ 10 =
  9. 9.15.78 ÷ 1000 =
  10. 10.6.58 × 1000 =
  11. 11.371.4 ÷ 1000 =
  12. 12.3.22 × 10 =
  13. 13.437.9 × 100 =
  14. 14.29.73 × 10 =
  15. 15.237.1 × 100 =
  16. 16.9.36 × 100 =
  17. 17.31.14 × 1000 =
  18. 18.411.5 ÷ 1000 =
  19. 19.89.3 × 10 =
  20. 20.255.4 × 100 =
  21. 21.7.85 × 100 =
  22. 22.14.6 × 10 =
  23. 23.34.41 × 100 =
  24. 24.10.84 × 1000 =
  25. 25.44.31 × 10 =
  26. 26.363.4 × 10 =
  27. 27.15.77 ÷ 1000 =
  28. 28.33.04 × 10 =
  29. 29.3.27 × 100 =
  30. 30.404.6 × 100 =
  31. 31.23.02 ÷ 10 =
  32. 32.11.03 ÷ 1000 =
  33. 33.15.44 ÷ 100 =
  34. 34.392.5 ÷ 100 =
  35. 35.199.5 × 10 =
  36. 36.9.45 ÷ 1000 =
  37. 37.335.1 × 100 =
  38. 38.495.2 × 10 =
  39. 39.47.31 × 10 =
  40. 40.2.8 × 1000 =

Answer key

  1. 0.989
  2. 2810
  3. 8580
  4. 0.0409
  5. 10470
  6. 0.03891
  7. 0.3742
  8. 3.274
  9. 0.01578
  10. 6580
  11. 0.3714
  12. 32.2
  13. 43790
  14. 297.3
  15. 23710
  16. 936
  17. 31140
  18. 0.4115
  19. 893
  20. 25540
  21. 785
  22. 146
  23. 3441
  24. 10840
  25. 443.1
  26. 3634
  27. 0.01577
  28. 330.4
  29. 327
  30. 40460
  31. 2.302
  32. 0.01103
  33. 0.1544
  34. 3.925
  35. 1995
  36. 0.00945
  37. 33510
  38. 4952
  39. 473.1
  40. 2800

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